body {
    margin-top: 0;
    font-family: Courier, monospace;
}

h1 {
    width: 100%;
    height: 80px;
    border-top: 5px solid chocolate;
    border-bottom: 5px solid chocolate;
    text-align: center;
    line-height: 80px;
    margin: 0;
    margin-bottom: 20px;
}

h1, h2, h3 {
    font-family: 'Courier New';
}

section {
    width: 50%;
    float: left;
    padding: 0 30px;
}

aside {
    width: 25%;
    float: left;
}

nav {
    width: 20%;
    float: right;
}

footer {
    clear: both;
}

li {
    margin-top: 5px;
}

a {
    color: darksalmon;
}
section a[href*="http"] {
    background: url(external-link-52.png) no-repeat 100% 0;
    background-size: 16px 16px;
    padding-right: 19px;
}

aside > ul {
    list-style-type: square;
}

nav > ul {
    list-style-type: none;
}
nav a {
    display: block;
    width: 140px;
    height: 50px;
    border: 1px solid darksalmon;
    text-align: center;
    line-height: 50px;
    margin: 20px 0;
    text-decoration: none;
}
nav a:hover {
    background-color: lightsalmon;
    color: #fff;
}